Seattle Weather In January: What To Expect

Sally-Anne Huang · Aug 27, 2025 · 6 min read ·Last updated: Sep 20, 2025

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Seattle Weather in January: What to Expect ## Understanding Seattle's January Climate January in Seattle is typically characterized by cool, wet weather. *Seattle weather in January* often sees the city shrouded in a blanket of gray, with frequent rainfall and relatively mild temperatures compared to other parts of the United States. The city's location in the Pacific Northwest contributes to this unique climate, influenced by the Pacific Ocean and the surrounding mountain ranges. This combination leads to a maritime climate, marked by wet winters and mild, relatively dry summers. To truly understand what January in Seattle entails, it’s essential to delve into the specifics of temperature, precipitation, and daylight hours. Knowing these details can help you plan your visit or daily activities more effectively. January is indeed one of the rainiest months in Seattle, so being prepared for wet conditions is crucial. Despite the rain, the city maintains a certain charm during this time, with its evergreen trees providing a splash of color against the gray skies. Seattle's unique weather patterns are something locals have learned to embrace, and visitors should be prepared to do the same. ## Typical Temperatures in Seattle During January January in Seattle sees average daily high temperatures hovering around 45-50°F (7-10°C). These mild temperatures are a hallmark of Seattle’s maritime climate. Nighttime lows average around 35-40°F (2-4°C), rarely dipping below freezing for extended periods. *Seattle weather in January* remains relatively stable compared to other regions that experience more drastic temperature swings. This consistency is due to the moderating influence of the Pacific Ocean. Even though it's winter, the temperatures are generally not extreme, making it possible to enjoy outdoor activities with the right attire. While snow is not unheard of, it's less frequent than rain, and significant accumulations are rare in the city itself. The surrounding areas, such as the Cascade and Olympic Mountains, often receive substantial snowfall, making them popular destinations for winter sports enthusiasts. Preparing for temperatures within this range means dressing in layers and having waterproof outerwear ready. ## Precipitation Levels and Rainy Days In January One of the defining characteristics of Seattle's weather in January is the high level of precipitation. *Seattle weather in January* typically experiences an average of 15-20 rainy days, with total rainfall often exceeding 5 inches (127 mm). This makes it one of the wettest months of the year. The rain in Seattle is often a light, misty drizzle, rather than heavy downpours, but it can be persistent. This consistent moisture contributes to the lush greenery that the Pacific Northwest is famous for. The combination of mild temperatures and frequent rain creates a unique ecosystem that supports a variety of plant life. If you're planning to visit Seattle in January, it’s essential to pack waterproof clothing, including a good raincoat, waterproof shoes, and possibly an umbrella. The frequent rainfall can affect outdoor activities, but there are still plenty of things to do in the city, even on a rainy day. Seattle has a vibrant indoor scene, with numerous museums, galleries, theaters, and restaurants to explore. ## Daylight Hours and Sunshine in January Seattle in January experiences short daylight hours. *Seattle weather in January* only provides around 8-9 hours of daylight per day. The sun typically rises late and sets early, contributing to a perception of long, dark days. This lack of sunshine can affect mood and energy levels, so it's important to plan activities that can be enjoyed indoors or during the brighter parts of the day. Despite the limited sunshine, there are still some clear days in January, and when the sun does shine, it can be particularly beautiful against the backdrop of the city and the surrounding mountains. Many locals embrace the gray days as part of Seattle's character, and there is a certain coziness to the city during this time of year. To make the most of the daylight hours, consider planning outdoor activities for the middle of the day and exploring indoor attractions during the early morning and late afternoon. Light therapy lamps can also be helpful for managing the effects of limited sunlight. ## Preparing for Seattle Weather in January To prepare for *Seattle weather in January*, packing appropriately is crucial. Given the high likelihood of rain, waterproof clothing is essential. A good-quality raincoat, waterproof shoes or boots, and an umbrella are must-haves. Layering is also a key strategy for staying comfortable. The temperatures can fluctuate throughout the day, so wearing layers allows you to adjust your clothing as needed. Start with a moisture-wicking base layer, add an insulating middle layer, such as a fleece or sweater, and top it off with a waterproof outer layer. In addition to clothing, consider bringing accessories that will help you stay warm and dry, such as gloves, a hat, and a scarf. These items can make a big difference in your comfort level, especially if you plan to spend time outdoors. Don't forget about protecting your electronics as well. A waterproof bag or cover for your phone and camera can help prevent damage from the rain. ## Activities and Attractions to Enjoy in Seattle in January Despite the wet weather, there are plenty of activities and attractions to enjoy in Seattle in January. The city has a vibrant indoor scene, with numerous museums, galleries, theaters, and restaurants. Visiting the Museum of Pop Culture (MoPOP), the Seattle Art Museum (SAM), or the Museum of Flight can provide hours of entertainment on a rainy day. Exploring the Pike Place Market is another great option. The market is mostly covered, so you can wander through the stalls, sample local produce, and watch the famous fish throwing without getting soaked. *Seattle weather in January* doesn't stop the fun. For those who enjoy the outdoors, there are still opportunities for hiking and exploring, especially in the forests surrounding the city. Many trails are accessible year-round, and the evergreen trees provide some shelter from the rain. Just be sure to wear appropriate footwear and clothing. Skiing and snowboarding are also popular activities in January, with several ski resorts located within a short drive of Seattle. The Cascade and Olympic Mountains offer excellent opportunities for winter sports. ## Tips for Staying Comfortable and Safe in Seattle's January Weather Staying comfortable and safe in *Seattle's weather in January* requires some planning and preparation. Be sure to check the weather forecast regularly and adjust your plans accordingly. If there is a severe storm or heavy rain, it's best to stay indoors. When venturing out, be aware of your surroundings and take precautions to avoid slips and falls. Wet surfaces can be slippery, so wear shoes with good traction and walk carefully. If you're driving, be extra cautious, as wet roads can be hazardous. Give yourself plenty of time to reach your destination and drive slowly. It's also important to stay warm and dry to prevent hypothermia. Dress in layers, wear waterproof clothing, and take breaks indoors to warm up if you're spending time outside. If you start to feel cold or wet, seek shelter immediately and change into dry clothes. ## Comparing Seattle Weather in January to Other Months Seattle weather in January is notably different from other months of the year. Compared to the summer months (June-August), January is much wetter and cooler. Summer in Seattle is typically dry and sunny, with average temperatures in the 70s°F (21-26°C). In contrast, January is characterized by frequent rain and temperatures in the 40s°F (4-10°C). Compared to the shoulder seasons (spring and fall), January is generally colder and wetter than the spring months (April-May), but similar to the fall months (October-November). Both fall and winter in Seattle see significant rainfall, but temperatures are slightly milder in the fall. *Seattle weather in January* is consistent. The transition from winter to spring can be gradual, with some rainy days still occurring in March and April. However, as spring progresses, the weather becomes drier and sunnier. Compared to other winter months (December and February), January is typically the wettest month, but temperatures are similar across all three months. If you prefer drier and sunnier weather, the best time to visit Seattle is during the summer. However, if you don't mind the rain and enjoy cozy, indoor activities, January can still be a pleasant time to visit. ## Impact of El Niño and La Niña on Seattle's January Weather El Niño and La Niña are climate patterns in the Pacific Ocean that can significantly impact weather conditions around the world, including Seattle. El Niño is characterized by warmer-than-average sea surface temperatures in the central and eastern tropical Pacific Ocean, while La Niña is characterized by cooler-than-average temperatures in the same region. These patterns can influence the jet stream, which in turn affects weather patterns in North America. During an El Niño year, Seattle tends to experience milder and drier conditions than usual in January. The warmer ocean temperatures can lead to a weaker jet stream, which results in fewer storms and less rainfall. Temperatures may also be slightly warmer than average. In contrast, during a La Niña year, Seattle is more likely to experience cooler and wetter conditions in January. The cooler ocean temperatures can strengthen the jet stream, which brings more storms and rainfall to the Pacific Northwest. Snowfall may also be more frequent during La Niña years. Understanding the current El Niño or La Niña status can provide some insight into what to expect from *Seattle weather in January*, but it's important to remember that these are just general trends, and actual weather conditions can vary. ## Frequently Asked Questions About Seattle Weather in January ### What is the average rainfall in Seattle during January? The average rainfall in Seattle during January is typically around 5-6 inches (127-152 mm), making it one of the wettest months of the year. The city experiences approximately 15-20 rainy days in January, so be prepared for frequent showers and drizzle. It's advisable to carry an umbrella or wear waterproof clothing if you plan to spend time outdoors during this month. ### How cold does it typically get in Seattle in January? Seattle experiences mild temperatures in January, with average daily highs ranging from 45-50°F (7-10°C) and nighttime lows around 35-40°F (2-4°C). While temperatures rarely dip below freezing for extended periods, it's still important to dress warmly and in layers. Snow is possible, but significant accumulations are not very common in the city itself. ### What are some indoor activities to enjoy in Seattle during January? Seattle offers numerous indoor activities to enjoy during the rainy month of January. Some popular options include visiting the Museum of Pop Culture (MoPOP), exploring the Seattle Art Museum (SAM), and touring the Museum of Flight. Pike Place Market is another great place to visit, as it is mostly covered and offers a variety of shops and food stalls. ### What should I pack when visiting Seattle in January? When visiting Seattle in January, it's essential to pack for wet and cool weather. Key items to include are a waterproof raincoat, waterproof shoes or boots, an umbrella, and clothing that can be layered. Gloves, a hat, and a scarf are also recommended to stay warm. Consider bringing a waterproof bag to protect your electronics from the rain. ### How do the short daylight hours in January affect activities in Seattle? The short daylight hours in January, with only about 8-9 hours of sunlight per day, can limit the time available for outdoor activities. It's best to plan outdoor excursions for the middle of the day and take advantage of indoor attractions during the early morning and late afternoon. Many locals embrace the cozy atmosphere of the city during this time and enjoy indoor entertainment options. ### Is it likely to snow in Seattle during January? While it is possible to snow in Seattle during January, significant snowfall is not very common in the city itself. The surrounding areas, such as the Cascade and Olympic Mountains, often receive substantial snowfall, making them popular destinations for winter sports. If snow does fall in the city, it usually melts quickly. ### How does Seattle's weather in January compare to other US cities? Seattle's weather in January is generally milder and wetter compared to many other US cities. Cities in the Midwest and Northeast often experience much colder temperatures and heavier snowfall during this month. Seattle's maritime climate, influenced by the Pacific Ocean, results in relatively stable temperatures and frequent rainfall, rather than extreme cold. ### What are the best ways to stay warm in Seattle's January weather? To stay warm in Seattle's January weather, dressing in layers is crucial. Start with a moisture-wicking base layer, add an insulating middle layer like a fleece or sweater, and top it off with a waterproof outer layer. Don't forget to wear gloves, a hat, and a scarf to protect yourself from the cold. Taking breaks indoors to warm up can also be helpful. ### References * [Visit Seattle](https://www.visitseattle.org/) * [National Weather Service - Seattle](https://www.weather.gov/sew/) * [The Old Farmer's Almanac - Seattle](https://www.almanac.com/weather/history/WA/Seattle)

Sally-Anne Huang

High Master at St Pauls School · St Paul's School

Over 30 years in independent education, including senior leadership, headship and governance in a range of settings. High Master of St Pauls School. Academic interests in young adult literature and educational leadership. Loves all things theatre

linkedin.com/in/sally-anne-huang-610676b5 · instagram.com/stpaulsschoollondon · facebook.com/StPaulsSchool1509

Seattle Weather In January: What To Expect

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Sally-Anne Huang

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